Posts Tagged ‘12-802-1’

Now that the TR4 Triumph fuel tank has been installed in the 1929 Ford roadster hot rod, it is time to think about a fuel delivery system for the 1929 Ford roadster hot rod.
Small block Chevrolet engines are almost all the same. These engines all come with a place to mount an “on engine” manual fuel pump. Engines that are carbureted have an extra lobe on the cam shaft to push a small rod in and out of the manual fuel pump as the engine rotates. Engines that are fuel injected do not have this extra fuel pump lobe on the cam shaft. The engine that I am using in the 1929 Ford roadster hot was originally fuel injected. Therefore, I have no choice but to use an electric fuel pump designed for carbureted engines.

The electric fuel pump that I decided on was a Holley 110 GPH “Blue” with regulator part #: 12-802-1. Of course, being fugal, I looked around for a used one. Fortunately, I found a used one only a few minutes from home for $50. This was a bit of a deal as the same one on the Holley web site lists for $139. The fellow I bought it from used it on a race car at the local track for a few runs before deciding to get out of the hobby. Since the fuel pump looked cosmetically good, and powered up fine, I bought it. Buying used electric parts can be a bit dicey, but the nice feature about these electric fuel pumps is that service kits are readily available from Holley.
The best location for the electric fuel pump is as close as possible to the fuel tank. These pumps work better pushing fuel rather than pulling fuel. On the 1929 Ford roadster hot rod, the TR4 Triumph fuel tank is located behind the seat. Not wanting the electric fuel pump in the cockpit area of the hot rod, mounting the fuel pump on the chassis was the next thought.

Before an exact location can be selected on the chassis for mounting the Holley electric fuel pump with regulator, the fuel line needs to be routed through the floor of the hot rod. A fuel filter was mounted directly under the TR4 Triumph fuel tank using a rubber hose connection. Using a short piece of rubber fuel line from the fuel filter with a second short piece of larger rubber hose used as a grommet to protect fuel line from unwanted wear at the section of fuel line that passes through the 1929 Ford roadster hot rod floor.
Using a small piece of 1.5 inch angle iron, a small bracket was made to attach the electric fuel pump to the chassis of the hot rod. As it worked out, the Holley electric fuel pump with regulator could be easily mounted to the rear cross member next to the upper shock mount. Using a threaded insert tool, four 0.25 inch threaded inserts were installed on the rear cross member. To help eliminated noise vibration from the electric fuel pump, a small piece of rubber belting and four rubber grommets were used to attach the fuel pump to the chassis. Another short piece of rubber fuel line passing through the hot rod floor from the fuel filter was used to attach to the fuel pump. This short rubber hose connection will allow for minor and ever so slight movement between the body of the hot rod and the chassis.

Now it’s time to complete the electrical connections. From the Holley website, this fuel pump draws 3 amps and they recommend using a 7.5 amp fuse. I measured the current draw using a direct current (DC) clamp and measured approximately 2.5 amps with no fuel to 3.8 amps with fuel. The 1929 Ford roadster hot rod engine is using a Weiand 8217 electric water pump that draws 4.5 amps. Giving this a bit of thought, I decided to share the fuse for the fuel and water pumps. For this application, I selected a 15 amp fuse which is approximately double the actual current draw for both electric pumps. To turn on both the fuel and water pumps, I used a 12v relay with 30 amps contacts that is controlled by the ignition switch in the hot rod. For safety purposes, I also installed an inertia switch in series with the power feed to the Holley electric fuel pump. The inertia switch came from a 1991 Ford Mustang. The inertia switch contacts will remain closed during normal operation of the hot rod allowing the electric fuel pump to operate. The inertia switch is mounted in the rear of the car in the trunk. If for some unfortunate reason, the car or hot rod is hit, the impact will cause the inertia switch to operate causing its switch contacts to open and turning the power off to the electric fuel pump. This is a highly recommended feature and of course the inertia switch can be reset.
At a later date, I will include complete wiring diagrams and instructions for a DIY wiring of the entire hot rod.